SO, over the past 3 years the middle section fo my bottom lips wil overtime turn black, it only happens around early December, and t is very ugly looking. I have tried every home remedy to stop this once for all but nthing helps that much. My lips are naturally pink and since they are big the black blotches are very noticeable someone plase help me, my dermatoligst appointment is not until January, and I have a feeling that they are not going to know much.